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Finding the Fourth Proportional to 516.27, 774.14 and 387.75

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Solution

The fourth proportional to 516.27, 774.14 and 387.75 is: 581.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.27 : 774.14 = 387.75 : x
  2. Step 2: Convert to fraction form
    516.27/774.14 = 387.75/x
  3. Step 3: Cross multiply
    516.27x = 774.14 × 387.75
  4. Step 4: Simplify right side
    516.27x = 300,170.85
  5. Step 5: Solve for x
    x = 300,170.85/516.27
  6. Step 6: Final answer
    x = 581.42

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.